Chapter 29: Q29-13P (page 1004)
Write a mechanism for step 6 of gluconeogenesis, the reduction of 3-phoshoglyceryl phosphate with NADH/H+ to yield glyceraldehyde 3-phosphate.
The Gluconeogenesis reaction is represented in the diagram below.
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PROBLEM 29-7 Identify the two steps of glycolysis in which ATP is produced.
The primary fate of acetyl CoA under normal metabolic conditions is degradation in the citric acid cycle to yield CO2. When the body is stressed by prolonged starvation, however, acetyl CoA is converted into compounds called ketone bodies, which can be used by the brain as a temporary fuel. Fill in the missing information indicated by the four question marks in the following biochemical pathway for the synthesis of ketone bodies from acetyl CoA:
PROBLEM 29-2Write the equations for the remaining passages of the oxidation pathway following those shown in Figure 29-4.
PROBLEM 29-8Look at the entire glycolysis pathway, and make a list of the kinds of organic reactions that take place-nucleophilic acyl substitutions, aldol reactions, E1cB reactions, and so forth.
Human and horse insulin both have two polypeptide chains, with one chain containing amino acids and the other containing role="math" localid="1663416014650" amino acids. They differ in primary structure at two places. At the position data-custom-editor="chemistry" in one chain, human insulin has Ser and horse insulin has Gly; at the position data-custom-editor="chemistry" in the other chain, human insulin has Thr and horse insulin has Ala. How must the DNA for the two insulins differ?
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